Gravitational energy a is a type of potential energy b is the energy of an object's position c is stored energy d all of the above

D all of the above

Explanation: That guy deserves brainliest Cause he has big brain, also 9 times out of 10 if they give you all of the above as an answer, it's right.

answer; the tunica intima also called tunica interna, consists of elastic fibers,connective tissue and smooth muscle cells;